GM Service Manual Online
For 1990-2009 cars only

Removal Procedure


    Object Number: 422521  Size: MH
  1. Disable the SIR system. Refer to SIR Disabling and Enabling .
  2. Remove the driver seat. Refer to Bucket Seat Replacement in Seats.
  3. Remove the driver seat adjuster track cover (1). Refer to Front Seat Adjuster Track Finish Cover Replacement in Seats.

  4. Object Number: 422522  Size: MH
  5. Remove the nut (1) from the driver seat belt pretensioner.

  6. Object Number: 422523  Size: MH
  7. Remove the driver seat belt pretensioner wiring harness (1) through the driver seat bottom frame.
  8. Remove the driver seat belt pretensioner (2) from the driver seat bottom frame.
  9. Fully deploy the module before disposal. If the module was replaced under warranty, fully deploy and dispose of the module after the required retention period. Refer to Pretensioner Handling and Scrapping .

Installation Procedure


    Object Number: 422523  Size: MH
  1. Install the driver seat belt pretensioner (2) to the driver seat bottom frame.
  2. Install the driver seat belt pretensioner wiring harness (1) through the driver seat bottom frame.

  3. Object Number: 422522  Size: MH

    Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

  4. Install the nut (1) to the driver seat belt pretensioner.
  5. Tighten
    Tighten the nut to 35 N·m (26 lb ft).


    Object Number: 422521  Size: MH
  6. Install the driver seat adjuster track cover (1). Refer to Front Seat Adjuster Track Finish Cover Replacement in Seats.
  7. Install the driver seat. Refer to Bucket Seat Replacement in Seats.
  8. Enable the SIR system. Refer to SIR Disabling and Enabling .